Automatic slicing, toasting, and buttering machine



d mllMLm w 1 3 .t la e 6 e 6 w. 6.5m lndv me cw m7 5 Bw W1 2A, T..9 NM2 Ele LTn su .AJ Rod Te -n WF .mmm

April 17, ma

INVENTOR. R/HARD LEN TZ A TTORN Y.

April 17, 192s.

R. LENTZ AUTOMATIC SLICING, TOASTING, AND BUTTERING MACHINE Filed Jun 29, 1925 7 Sheets-Sheet 2 INVENTOR. R/CHARD LENTZ TORN E Y.

April 17, 1928.

R. LEN-rz AUTOMATIC SLICING, TOASTING, AND BUTTERING ACHINE Filed June 29, 1925 7 Sheets-Sheet 3 INVENToR. RICHARD LE/VTZ v FATITORNEY. t

April 17, 1928. 1,666,335

R. LENTZ AUTOMATIC SLICIG, TOASTING, AND BUTTERING MACHINE Filed June 29, 1925 '7 Sheets-Sheet 4 F I g. 5

S A TTORNEz.

April 17, 1928.

R. LENTZ AUTOMATIC SLICING, TOASTING, AND BUTTERING MACHINE Filed June 29, 1925 7 Sheets-Sheet 5 loo) ATTORNEY.

yApril 17, 1928. 1,666,335

R. LENTZ AUTOMATIC SLICING, TOASTING, AND BUTTERING MACHINE Filed June 29, 1925 '7 Sheets-Sheet 6 l: I g. E

April 17, 1928. 1,666,335

R. LENTZ AUTOMATIC SLICING, TOASTING, AND BUTTERING IIACHINB Filed June 29, 1925 l Sheets-Sheet '7 III/III u INVENTOR. RICHARD LEN TZ T'A'TE s Auroxarxc'sncm roas'rmo, AND nUr'rEmNG uacnnm Application led June '29, 1825. Serielle. 40,194.

.This invention relates to a machine for pre aring bread for table use.

he general v bject ofthe inventionv is to provide an im roved machine which 'is adapted for slicing bread and wherein the slicing means maybe combined with means for toasting and buttering the bread.

One of the specific ob'ects of the invention is to provide a combin bread slicing, toasting and buttering machine.

Another object of the invention is to provide an automatic toasting machine with means for causing the machine to deliver a predetermined number of slices of toast.

Another object of the invention is to provide a bread slicin` machine wherein a continuously rotating llinife is employed.

A further object of the invention is to provide an improved bread toasting mechanism.

Another object of the inventlon is to provide an improved buttering mechanism for applying butter tol bread or toast.

Other objects of the invention will be apparent from the following description taken in connection with the accompanying drawings wherein',

Fig. 1 is a side elevation of a machine embodying the features of my invention;

Fig. 2 is an end view of the machine;

Fig. 3 is a cross section taken on line 3-3, Fi". 4;

Fig. 4 is a transverse fragmentary section laken on line 4-4, Fig. 3;

Fig. 5 is a central, vertical, longitudinal section of the buttering or discharge end of the device;

Fig. 6 is a section on line 6 6, Fig. 4;

Fig. 7 is a detail, partly broken away,

i showing the automatic stop mechanism;

Fig. 8 is a section on line 8--8, Fig. 7 with the star-wheel of the Geneva movement shown in elevation; 4

Figs. 9 and 10 are top plan views of parts of the stop mechanism;

Fig. 11'is a plan view partly in section showlng details of the feed control; v

Fig. 12 is a fragmentary elevation partly in section showin details of the means for adusting the heating elements;

`igs. 13 and 14 are cross sectional views' taken on lines 13-13, and 14-14 respectively, Fig. 12;

Fig. 15 is a sectional detail taken on line 15-15, Fig. 6;

Fig. 16 is a sectional detail taken on line 16-16, Fig. 15`; and,

Mounted upon the base 10, I show` a motor 12 which is supported adjacent to a gear case 13. The armature shaft 14 of the motor has a gear 15 thereon which drives a r 16 arranged on a. shaft 17. The shaft 1 is arranged to rotate coaxiall Y with the shaft 14 but independently thereo The gear 19 has a sprocket 20 thereon which carries a. chain 21. This chain 21 sprocket 22 mounted on a sha 23.

The shaft 23 is also provided with spaced sprockets 24 overl which chains 25 .'pass. These chains 25 ass over other s rockets 26 arranged on a s aft 27 at the ot er end of the machine. The chains 25 are connected by barsA 25 upon which the bread is conveed, as will be later described.

he shaftv 23 is also provided with a sprocket 30 which receives a chain 31 for driving another sprocket 32. This sprocket 32 is arranged on a shaft 33 and-keyed to this shaft, show a` bevel gear 34 which meshes with a second bevel gear 35 keyed on a shaft 36. This shaft 36 1s rovided with a gear 37 which is adapted to' rive a gear 38 mounted on a shaft 39. l

Fixed on the shaft 39 is a cam 40 which ,is adapted to engage a bell crank lever 40' which is pivote on an arm 42 thereon along which a memberv 43 is adLustably mounted. The member 43 has a lin 44 which is pivotall mounted as at 45 upon a rock arm 46. he vrock arm 46 has a pawl 47 thereon which is resiliently urged, by means of a spring 48, into e ment with a ratchet 49 arranged on shaft 50.

The result of this construction is 4that when the motor 12 is operated iti will cause the bevel gears 34 and 35 to be driven thus causing rotation of the shaft 39 and through the cam 40 will cause movement of the bell crank 40', thus rocking the bell crank and.

turning the shaft 50 riodically.

The shaft 50 extends lon ltu'dinally of the machine and is thre ed substantially throughout its length. Above the shaft 50 I arrange a support or table 51 upon. which has' a i l gear 18 thereon which drives a gear 19 which asses over a.

a shaft 41 and which has the loaf of bread-is adapted to be placed and alon which it will be moved by a follower 52 w ich has a base 53 slidable on the table 51. The base 53 of the follower 52 constitutesan upper rtion 54 and a lower pligtion 55 arranged neath the table 51. e portion 55 is provided with a boss 59 which is apertured to receive thescrew shaft 50 along which it may freely slide.

Mounted u n the lower portion 55 is a lever 61 whicliois shown as connected at one end by Va pivot- 63 for sliding movement in a slot 64 arranged on an operating handle 65 which is pivoted to the lower portion 55. The operating handle has a s ring 66 thereon which egages a companion` andle portion 67 which is fixed with regard to the part 53. Mounted on the base 10 is an elongated rod 68 which is received in a bearing 69, arranged on the lower portion 55. It will thus be seen that the follower is supported on the table 51, the sei'ew shaft 50, and the rod 68 for sliding movement. The inner end of the lever 61 is provided with teeth 62 constituting parts of threads which are adapted to enga the thread on the screw 50 so that as this screw turns the lever 61 will be moved along the screw and will carry the follower 53 with it.

The follower is provided with an upstanding projection 69 which has apertures 70 therein in which pins 71 mounted on an inverted U-shaped bread holdin member 72 ma slide. This member 72 is a so provided wit a pin 73 which fits an aperture 73 for sliding movement. 'Ihe lower end of the pin engages a spring 74 which normally urges the holding member 72 upwardly. The proection 69 and the holding member 72 have oles 75 and 75 therein. In the hole 75` I arrange a locking bolt 76 which is normally urged outward] by a spring 7 6. A pin 77 works in a slot 77 to limit movement of the bolt 76. The hole 75 is shown as provided with a shouldered pin 78 the head of which is adapted to engage the beveled end 78 of the bolt 76. The construction is such that when the member 72 is ressed down the bolt 76 will snap into the ho e '75'. To release the member 72 the pin 78 will be pressed causing this in to engage the beveled end 78 and there y move the pin 76 until its end is flush with the wall of the member 72 whereupon the spring 74 will push the member 72 upwardly. The member 72 is provided with y bread engaging prongs 80.

To arrange a loaf of bread on the machine for operation, the handle 65 will first be grasped and will be operated causing theI lever 61 to be retracted to free the inner end of this lever from engagement with the screw shaft 50. The follower 52 bei t-hus freed to move along the table 51, it will be moved to the right in Fig. 1. When the follower is in the desired position the handle 65 will be released and the follower will be in position tr be driven by the screw shaft 50.

The handle portion 82 on the member 72 will then be grasped and the pin 78 depressed so thatthe member 72 can be raised.

After the member 72 is raised the bread will be positioned against the guide 81v and the handle 82 will then be depressed to cause the prongs to enter the bread. The device is then ready for operation and upon the starting oi the motor the arm 42 will rock thereby rocking the lever 46 and causing the screw 50 to intermittently feed the bread forward.

In order to slice the bread I show a rotating knife 85 mounted upon the shaft 39, and arranged at the outer -end of the table. This knife is preferably curved as shown in Fig. 3, and has a scalloped or fluted cutting edge 86. The knife is so keyed to rotate with the shaft 39 that its back edge 87 (see Fig. 3) will clear the loaf of bread just prior to the time the bread is advanced. This enables the bread to advance while the knife which continues torotate, is out of the path of movement of the bread.

The slices of bread cut by the knife will fall downwardly from the remainder of the loaf and will strike an inclined baille 88 which will direct the bread to the cross hars 25 on the conveyor chains 25, previously described. The bailile 88 is pivoted on :i shaft 89 and integral with this baille is a front closure plate 90 which covers the front of the machine case 91. The closure plate 90 will be lowered to the dotted line position shown in Fig. 4, when the baille 88 is raised to the dotted line position shown in this figure, so slices of bread may be directly discharged without delivering them to the chailis 25.

It may be stated here that my invention is adapted for use as a bread slicer or for slicing other commodities and that it may be used without the toasting and buttering devices which I shall now proceed to describe.

In order to toast the slices of bread which are being advanced by the chains 25 I provide a pair of heating elements and 101 which I will call the upper and lower elements respectively. v"These heating elements are adapted to be electrically operated and are provided with spaced links 101. There are four sets of these links arranged on the upper and lower elements. The end sets of links at each side are pivotally connected to hollow supports 102 while the intermediate links are pivoted to hollow supports 102.

Each of the supports 102 and 102 are mounted on blocks 102, 'and 102b respectively. Tlie blocks are fitted within the hollow supports so that the supports ma y move vertically upon the blocks to thus adjust the position of the heating elements.

The block 102 at one end of one side is supported for free sliding movement on a tube 103 which is mounted loosel on the reduced portion of the rod 104. he other blocks on the last mentioned side are mounted on the enlarged port-ion of the lrod 104. The blocks on the other side are mounted on a rod 104.

Springs 104" normally urge the supports 102 upward on the blocks. The blocks have their lower faces 105 beveled and these beveled faces engage the ends of pivoted levers 105 which are shown as connected for uniform movement to links 1.06 by pivot members 106'. The'pivot lnember 106' at one side is extended and is connected in a slot 106 of an arm 107 which is keyed to the tube 103. The end 107n of the tube 103 is provided with an arm 107 which through a in 107 is adapted to be rocked by a lilik on which a pin 108 engages within a slot in a bell crank 108" which is pivoted at 108 to the fra-me and which is held at one end in an aperture 108 and at the othel' end in a bracket 108" which isprovided with a pin 108'l which works in a slot 108 on the link 44. The link 44 is mounted on the adjustable member 43 by means of a ball and socket joint 108.

It will be remembered that when the member 43 is moved along the arm 42 that the travel of the rockl arm 46 will bc adjusted to control the thickness of the slices of bread. From the description of the heating element control just described, it will be apparent that, for example, upon movement of the member 43 outwardly to toast thicker slices, the resultant adjustment of the link 44 will shift the lower art of the bell crank 108'J inwardl thus s ifting the link 108I inwardly whic in turn will cause the lever 107b to turn the tube 103 clockwise thereby rocking the lever 107 and consequently rocking the levers clockwise, to move the blocks 102 and 102-b upwardly, thereby shifting the elements 100 and 101 vertically. y

The construction and arrangement of parts is such that the axes of the rods 104 and 104' are in the same plane as the center of the slice of bread 109, shown in Fig. 13, and as the adjustable member 43 is shifted to change the thickness of the slices it will shift the elements 100 and 101 so that these elements remain equal distance froml the slices of bread so that an even toasting action will be provided.

In order that the distance between the elements may be changed to cause a slow or rapid toasting action, I show the intermediate blocks '102'. which are arranged upon the enlarged portion of the rod 104 as threaded. The rod adjacent these last mentioned blocks is threaded as at 109. By referring to Fi 12, it will be noted that the threads on a jacent blocks extend in dierent directions and the result is that Aand from each other.

In order to turn the rod 104 and colisequently change the position of the elements, I provide the end of this rod with a knob 109b which is pinned to the end of the rod 104 and which is provided with an index 109c which moves over a scale 110.

lVhen the knob 109b is turned the rod 103 will be turned and the threaded portion 109 engaging the lthreaded blocks will cause relative movement between the rod and the blocks.

The heating elements are prevented from being moved by the toggle arms, by arms 110 which have slots 110 fitting over pins 111 on the blocks 102. The arms 110 are shown as pivoted on shafts 111l (see Fig. 13). v

After the toasted bread passes from between the heating elements 100 and 101 it may be discharged down a chute without vbeing first buttered. I prefer, however, to butter the toast as soon as it leaves the proximity of the heatin elements 100 and 101. To accomplish this battering operation, I mount a butter-ing roll 121 on a shaft 122. This battering roll is adapted to be driven by a belt 123 from a pulley 124 arranged on the shaft 27 and which engages a pulley 125 mounted on the shaft 122.

A butter receptacle 126 is disposed above the but-tering roll 125 and'is rovided with an aperture 127 through vwhlch the butter drops. The receptacle 126 is surrounded by 'electrically operatedheating coils 128 to keep the butter ina plastic or fluid condition. The receptacle isv provided with transversely extending rods 129 and ad'acent these rods I pivot a vertically exten ing member 130 which has offset portions 131 extending between the rods 129. The memberV 130 is mounted on a iv'ot 132 which has a member 133 securedt ereon. This member.133 ,is notched at its upper end 134 to receive :t tongue 135 fixed on a shaft 136. The sha-ft 136 has a crank 137 thereon to which a pitman 138 mounted on a. disc 139 is connected. The disc 139 is arranged on the shaft 27 so that as this shaft rotates the pitman will be rocked thus moving the member 133 backward and forward to keep the butter in motion. v l v f Beneath the aperture 127 I arrange a closure 140 which has a link '141 pivoted to a bell crank 142 which is mounted on a shaft 143. The bell crank 142 includes an arm 144 having a bread engaging roller 145 thereon will 'lift this roller and will cause the closure 'nsY llb

par

shaft 148. Thearm 148 thereon'vvrhigch-u4 The shaft 150 isf lal - operated without current, thev sliced' bread will passthrouglrthe" machine and will bev buttered without being toasted.

ghe buttering rollerA 125 1s preferably made of soft orousv felt-like material and in order Ato adjust the position ofthis roller withrespect to the bread mount the f i roller upon an arm 147 which-31s 'eccentric disc v y y 'rating by device, Ijmay slice' the hreadf'an deliver itas Ilmay also 'slice thebread, toast it,ibu`tter1it Aand deliver l it, and from the fo y descriptionit V willalso be ap.- parentrgtli-,Eyl leaving theheatin elements w` ich are preferablye ectrically If desired, the supply of butter may be omitted so that thebread may be sliced and toasted without buttering 1t. Instead of placing 'butter in the receptacle 126 Imay place ground meat, jams, etc.,and place them on the sliced bread.

The use to which my invention is )articularly adapted, namely, for hotelV am restaurant trade, makes it desirable that the machine operate. without personal attention and .for this reason, I have provided means which I will now proceed to describe, whereby the operator may set the machine to produce a number of pieces of sliced bread after which the machine will automatically sto its operation. f

'Fo bring about the result just described, I make the shaft 36 in two pa s and connect these parts by. a sliding clut h 160. This th clutch is provided with an operating. lever 161 which is pivotally mounted on-'a shaft 1.62 secured u ona bracket 163 mounted on the outside o a case 164.

Within the case 164, I arrange mechanism for automatically actuating the vclutchj160 after av predetermined number of slices of bread have been madek Mounted upon the shaft 36, I show a collar 165 which has'a.l projecting portion 1,66 thereon from whichV a pin 167 protrudes,` ,This pin 167 is,v adapted to engage thestar wheel 168 of' av Geneva-stop mechansm.[ The star wheel' 168 is ke ed on a--shaft 169 also keye a spur-gear170. l

The arrangement of parts is such that the outer periphery of the collar 165 engages the arcuate faces 171 of the star wheel 168 during a. portion of a revolution of the shaft 86 and during the remainder of the revolu- Iupon which lis tion of the shaft the in 167 enters the slots 172 to cause a parta rotation of the shaft 169 and consequently cause a partial rotation of the ar 170.

The gear 1 0 meshes with a gear 175 which is mounted on a bushing 176 whichis slidable within the case 164. A spring 177 normally urges'the gear 175 upwardly (in Fig.

, 8) andas this gear 175 goes upwardly its teeth alon the teeth of the gear 170. The-bushing 1 6 is provided with an l end member 178 which has a pivot 179-to "which the end of the lever 161 is pivoted.

From the foregxoing description it will be apparent that w en the gear 175 and the bushing 176 are `moved upwardly by the springs 177 theA clutch 160 will disengage the two vsections of the shaft 36.

vIn order to hold the clutch in the engaged position I mount a shaft 180 within the case 164. This shaft has a. handle 180 thereon and one end portion fitted within the bushing 176 for free turningmovement and upon the shaft I arran e a free disc 181 which has a pluralit o spring pressed locking balls 182 whic engage in apertures in the face of the gear 17 5. A spring 183 normally vforces the disc 181 against the ear 17 5. This spring 183 is weaker than the spring 177 for a purpose to be later described.

The disc 181 is indicated as provided with bosses 184, 185, and 186 on Ithe upper face thereof. Above the disc 181 I fix a disc 187 which has apertures 188, 189, and 190 corresponding to the bosses 184, 185, and 186. The disc 181 has eripheral notches 191 and 192 thereon whic fit projections 193 and 194 on a collar 195 which has an operating portion 196 which projects beyond the Vcase 164. The case has an aperture 197 therein and the collar 195 has a scale 198 thereon.

To set the device to cause a certain number of slices of ,breadv to be cut the handle 18012is depressed. This 'action will increase ye tension inthe spring 183 and will cause the disc 181 to moveto the position shown in v`.E`ig. 8, lwith the projections193 and 194 sliding in the slots' 191 and 192. While the handle 1.180 `is lheld depressed, the operating th'eicl'frectvnllmbr 0n t le scale 198 appears aperture. 197. When the correct is secured thehandle 180 will be n The bosses'184, 185, and 186 will 1t en the lower face of the disc 187 sothat the vspring 177 'cannot act to release vthe 43111111211.

As the gear 170 is slowly rotated the disc 181 will be slowly turned until finally the bosses 184, and 185 and 186 register with the apertures 188, 189, and 190 at which time the spring 177 will slide the' gear 175 along the gear 170 and will cause. the bushing 176 to rock the lever 161 and consequently disengage the clutch.

ments,

In order that the buttering roll 121 may be readily removed, I make the shaft 122 a two part one. The (part 200' shown at the right in Fig. 17 an on wlnch the 'pulley 125 is keye for sliding movement is provided with un operating knob 201 and with a collar 202 iixed thereon. A spring 203 normall engages the collar 202 and urges this col ar and the part 200 to the left in Fig. 17. A pin 204 passes through the part 200 and engages a pocket in an end plate 205 of the battering roll so that the pulley 125 will drive the roll 121.

The other end of the roll 121 lis provided with a recess 206 through which the shaft 122 extends, the shaft has a collar 207 iixed thereon which is en aged with a spring 208.

To insert a new gbuttering roll the knob 201 is pulled moving the part 200 to the right in Fig. 17. This allows the spring 208 to push the shaft 122 out of its bearing so that the roll can be removed. A'new roll will then be inserted and the knob 201 released to secure the roll in place.

Having thus described my invention, I claim:

1. In a device of the class described, a frame, a support or the bread, means to slice said bread, adjusting means to adjust the'thickness of the slices, a toasting device including spaced elements, means to feed the sliced bread between said elements, said means including a conveyor and means connected to said adjusting means to move one elementtowards and from the conveyor as the adjusting means is operated to cut a thicker or a thinner slice. y,

2. In a toasting device, a pair of s aced elements, .a conveyor for conveying read between said elements, means to hold said elements in s aced apart relation and single means to shi t said elements' relative to the conve or while held in spaced apart relation.

3. n a toaster, a pair of spaced elements, means to hold an article between said ele- I shiftable means for moving said elements as a unit and other means for moving said elements toward and from each other.

4. In a toasting device, a pair of spaced elements, a conveyor for conveying bread between said elements, means to hold said elementsin spaced apart relation, means'to shift said elements relative to the conveyor while held in spaced apart relation, and means to move said elements toward and from each other.

5. In a bread slicing mechanism, a sup-` port for bread', means to slice said bread, means to adjust the thickness of each slice, bread advancing means 'for moving the sliced bread from the slicing means, a heating element spaced from, the bread moving means, means to adjust the distance between the moving mea-ns and the element, andA a single means to control the thickness of the slicea-nd the distance of the element from the bread moving means.

In a device of the class described, a frame, a support for b1 ad thereon, means to slice said bread, a pairof heating elements, means to adjustably space said elements a predetermined distance apart, means to feed the sliced bread between said elements, means to govern the thickness of each slice and means whereby when the thickness of the slice is increased or diminished the elements will be separated or brought togcthcr.

7. In a bread toasting mechanism, a conveyoil'or bread, a pair of heating elements, means to hold said heating elements one above and one spaced below said conveyor,

meansl to advance the bread between said heating elements, means to change the distance between said elements, and other means operable independently of the 'first mentioned means l'or centering the elements` relative to the bread.

8. In a bread toasting mechanism, an endless conveyor having an upper and a lower reach, means to drive said conveyor to advance said upper reach, a pair of heating elements, supporting means to hold said heating elements spaced one above and one below said upper reach, means to change the distance between said elements, and other means for moving the supporting means to shift the elements in the same direction.

9. In a bread toasting mechanism, a support for bread, means to advance the bread on said support step by step, means to slice the bread, a pair of heating elements, means to hold said heating elements a spaced distance apart, means to feed the sliced bread between said heating elements, means to adjust the thickness of each slice of bread, means to shift the elements to kee them an equal distance from the top and ottoni oi" the bread and single means for controlling the two last mentioned means.

In testimony whereof, I hereunto affix my signature.

RICHARD LENTZ.

lll) 

